Soap preparation



Patented Nov. 17, 1936 UNITED STATES SOAP PREPARATION Walter Kling,Chemnitz, Germany, assignor to H. Th. Bohme Aktiengesellschaft,Chemnitz, Germany, a corporation of Germany No Drawing. Application May31, 1932, Serial No. 614,628. In Germany June 12, 1931 2 Claims.

This invention relates to soap compositions of such high quality as tobe especially suitable as toilet soaps and as medicinal soaps, soaps ofthis character intended for use on the body being referred to herein asbath soaps to distinguish from industrial soaps and the like of acoarser nature.

More particularly, it relates to soap preparations having as theprincipal constituent one or more alkali salts of sulphuric derivativesof the higher aliphatic hydroxy hydrocarbons.

The soap compositions constituting the present invention contain inaddition to these salts a superfatting agent, and one or more agents togive to the preparation some special property or properties, as willhereinafter be more clearly explained.

The sulphuric derivatives of the higher aliphatic hydroxy hydrocarbonsfrom which the alkali salts are obtained may be esters, sulphonates, ormixed esters and sulphonates. The method by which these sulphuricderivatives are produced does not constitute part of the presentinvention, for suitable methods of producing the same are already known.The hydroxy hydrocarbons themselves may be obtained in the form ofalcohols from natural waxes, or by the oxidation of saturated aliphatichydrocarbons, or by the reduction of fatty acids or fatty acidderivatives. Instead of first producing the hydroxy hydrocarbon and thensulphonating, the reverse order may be followed.

The salts of sulphuric derivatives of higher aliphatic hydroxyhydrocarbons found suitable are those containing more than eight carbonatoms in the chain, such for example, as sodium dodecyl sulphate andsodium octadecenyl sulphonate.

The superfatting agents employed include, for example, wool fat,lanolin, higher aliphatic alcohols such as octadecenol and octadecanol,and other like products having similar properties.

In order to give the soap some special property making it suitable for aparticular purpose, there is added a quantity of one or more therapeuticsubstances, antiseptic agents, dyestufis or perfumes, as is done in thepreparation of ordinary bath soaps.

The soap preparations of the present invention may be compounded byincorporating the superfatting agent or agents into the sulphuric.derivative of the higher aliphatic hydroxy hydrocarbon before the sameis neutralized for the formation of the sodium or other alkali salt.

The preparation may also be produced by partially sulphonating orsulphating a suitable fattralizing the sulphuric derivative.

ty alcohol or mixture of fatty alcohols, and neu- In this case, theunreacted excess of the higher aliphatic alcohol acts as thesuperfatting agent in the final product.

The therapeutic agent may be added to any of the ingredients used or toany mixture thereof so long as it does not interfere with the productionof a composition of proper consistency, or will not itself be destroyedor otherwise rendered ineffective by the subsequent treatment incompleting the preparation.

The proportions of the components in the soap preparations are notcritical, but may be varied within wide limits, according to theparticular agents used and the properties desired in the final product.

Example For the production of a soap composition suitable as a shavingsoap, 90 kgs. of sodium dodecyl sulphate are mixed in any suitablemachine with kgs. of lanolin and a small quantity of perfume.

same is shaped and pressed into bars in the usual manner, by means of abar press.

In similar fashion special toilet and medicinal soaps may be made byadding to the basic mass, in addition to the superfatting agent, in theusual amounts, other agents customarily added to soaps, in particular,antiseptic or other therapeutic substances.

The soap preparations of the present invention have exceptionally highcleansing power and will not cause irritation of any kind on even themost sensitive skin. As contrasted with ordinary soaps, they have theadvantage that they are not adversely aifected by use in very hard oreven sea water, this quality being due to their absolute stability inthe presence of lime and magnesia salts.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent is:

1. A bath soap composition adapted to produce When the mass becomeshomogeneous, the V a non-alkaline solution upon hydrolysis in water,

WALTER KLING.

